AppLogger is a library that allows an application programmer to provide run-time customizable output from an application. It includes a function, applogger_log(), with calling semantics analogous to the standard C library's printf(), but with extra arguments to specify a classification for the output message. Calls to applogger_log() thus specify the classification and text of a message; calls to other functions in the AppLogger library determine the real-time policy applogger_log() applies to messages of a given classification: print to file, send over a network socket, ignore the message, etc. In short, AppLogger allows for the separation of message content and message output policy in an application.
